Uninsured Americans who didn’t sign up for ObamaCare in time can start filing appeals Thursday if they blame the balky government Web site.

President Obama’s administration says it “still may be able to help” those people who couldn’t access the site due to heavy traffic or maintenance shutdowns.

The feds are also promising a “robust” process to consider claims on a case-by-case basis.

It’s unclear exactly how many procrastinators got shut out during this week’s last-minute rush.

The glitch-ridden HealthCare.gov site received a record 2 million visits Monday, forcing 129,000 people who couldn’t access it to send e-mails as part of its “advanced queuing system” for periods of peak demand.

Monday’s midnight deadline was extended until Tuesday, when officials said the volume of visitors to the site remained high.

Meanwhile, residents in a handful of states running their own ObamaCare programs still have time to sign up.

In Washington state, anyone who began enrolling by Monday has until Jan. 15 to get a retroactive policy.

Early signs suggest the number of people enrolling in ObamaCare this year will be about 1 million short of projections.

A spokesman for the Centers for Medicare and Medicaid Services declined on Wednesday to provide additional information on the appeals process.